Anyone use one of these booster set ups?

[crj1968]

http://www.ebay.com/itm/Mopar-8-dual-brake-booster-1-1-8-bore-master-cylinder-w-disc-drum-valve-/331799861787?hash=item4d40d01a1b:m:mDhVvS3YxcxfKB3A_Gi20-A&vxp=mtr

Says a direct bolt on to a manual brake and and requires EZ mod for power brake car.  I asked seller what that mod entails but no answer.

Anyone know?   

Thanks!

[Derwud]

Or save a few bucks.

http://www.autocityclassic.com/mopar-disc-brake-conversions/mopar-a-b-e-body-cuda-charger-brake-booster-master-cyl.-mprpb/

[crj1968]

Thanks- although that one doesn't include the valve. 

Not sure why these guys selling them can't just say what the EZ modification is. Likely they don't know and are just distributors...